Portable power source



FIG. 1 is a front perspective view of a portable power source.

FIG. 2 is a rear perspective view of the portable power source shown in FIG. 1.

FIG. 3 is a front view of the portable power source shown in FIG. 1.

FIG. 4 is a rear view of the portable power source shown in FIG. 1.

FIG. 5 is a first side view of the portable power source shown in FIG. 1.

FIG. 6 is a second side view of the portable power source shown in FIG. 1.

FIG. 7 is a top view of the portable power source shown in FIG. 1; and, ex

FIG. 8 is a bottom view of the portable power source shown in FIG. 1.

Broken lines in the drawings show portions of the portable power source that form no part of the claimed design. 

CLAIM We claim the ornamental design for a portable power source, as shown and described. 